Encyclopedias, Almanacs, Transcripts, and Maps
- Delaware Water Gap
- Delbrück, Hans
- Delbrück, Rudolf von
- Delderfield, R. F.
- Delémont
- Delian problem
- Delibes, Miguel
- Delium
- Della Porta
- Dells of the Wisconsin
- Delmarva
- Delmedigo, Elijah ben Moses Abba
- DeLorean, John Zachary
- Delphic oracle
- Delsarte, François
- Delta Plan
- Demangeon, Albert
- Demavend
- Demerol
- Demetrius Phalereus